具有双光子光折变效应的光伏光折变波导中的明亮光空间孤子

IF 1.2 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Revista Mexicana De Fisica Pub Date : 2023-03-01 DOI:10.31349/revmexfis.69.021301
Aavishkar Katti
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引用次数: 0

摘要

我们首次研究了双光子光折射波导中的光折射孤子,该波导也表现出体光伏效应。在傍轴射线近似和Wentzel-Kramers-Brilloin-Jefferys(WKBJ)近似下,得到了这类孤子的动力学演化方程。导出了孤子的存在曲线,并根据自陷阈值功率在没有波导的情况下识别了四个不同的功率区域。已经观察到存在双稳态。我们研究了平面波导的影响,发现它增强了自陷非线性,从而降低了形成孤子所需的阈值功率。研究了不同波导强度下光束的传播。通常不会被自陷的光束现在可以通过平面波导结构变成孤立子。最后,我们通过李雅普诺夫方法和数值模拟研究了这些孤子的线性稳定性。
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Bright optical spatial solitons in a photovoltaic photorefractive waveguide exhibiting the two photon photorefractive effect
We investigate for the first time, photorefractive solitons in a two photon photorefractive waveguide which also exhibits the bulk photovoltaic effect. The dynamical evolution equation of such solitons has been obtained under the paraxial ray approximation along with the Wentzel-Kramers-Brilluoin Jefferys (WKBJ) approximation. The existence curve for the solitons is derived and four distinct regions of power have been identified in the absence of waveguiding depending upon the threshold power for self trapping. Bistable states have been observed to be present. We have studied the effect of the planar waveguide and found that it enhances the self trapping nonlinearity and hence results in a reduction of the threshold power required for formation of the soliton. The propagation of the light beam is studied for various different strengths of the waveguide. A beam which would not have normally been self trapped can now become a soliton by virtue of the planar waveguide structure. Finally, we investigate the linear stability of these solitons by both, the Lyapunov method and numerical simulations.
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来源期刊
Revista Mexicana De Fisica
Revista Mexicana De Fisica 物理-物理:综合
CiteScore
2.20
自引率
11.80%
发文量
87
审稿时长
4-8 weeks
期刊介绍: Durante los últimos años, los responsables de la Revista Mexicana de Física, la Revista Mexicana de Física E y la Revista Mexicana de Física S, hemos realizado esfuerzos para fortalecer la presencia de estas publicaciones en nuestra página Web ( http://rmf.smf.mx).
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